Improvement in saws



UNITEn 'STATES PATENT OFFICE."

HIRAM P. DILLINGHAM, OF NORWALK, OHIO, SS-.IGNOR TO M. O. VVAGGONER AAND GEO. P. ROBERTS, OF SAME PLACE.

IMPRovl-:M ENT IN sAws,

Specification forming part of Letters Patenf No. 5 l .385, dated December 5, 1865.

L To all'fwzom @may concern:

Be it known that I, HIRAM P. DILLINGHAivr, r of Norwalk, Huron county, inthe State ot'Ohio,

haveinvented certain new and useful Improve- ,men'ts in Saws; and ,I do hereby declarev that Athe followings fnlland exact desc-:i'ption thereof, reference being `had to the accompany- 'ing drawings, and -to the letters of reference thereon marked.

The object of myinvention is toso construct the`teeth of all kinds of saws used for cutting lumber as to prevent the teeth from making too deep a cut; and the nature ot' my invention consists in making' certain of the teethforinstance, every third or fourth tooth-serve .as guards, so as to preclude a cut deeper than the pitch-line ofthe guard-teeth. That the natural tendency cfa saw with only hooked teeth would be to draw the carriage, with the log ortimber, to the saw in such a manner as to clog the run of the saw to such an extent in knotty and cross-grained timber as to break the machinery 'used in propelling thesaw. In order to obviate the aforesaid d iffculty l'have invented the guard-teeth to prevent the clogging, and thus control. the cut of the saw.

'^ In `lthe drawing, B- represents the cuttingteeth, which are pointed or formed of the desired shape best suited for cutting.

.shown at a b, shall be shorter than the cnt- ..tingteeth, the depth ofthe desired. cut being equal to the difference between the length or' the guard and of the cuttingteeth. By this i construction I impart to the saw greater durability, since, by gradnutingthe saw to one certain cut, I avoid the danger of breaking the teeth, or injuring the driving-machinery b v accidentally taking toodeep a cut.

It is seen at aglance that in operating a saw thus constructed the guard-teeth will operate so as to keep the cutting-teeth from making a cut deeper than the pitch-line of the guardteeth. Havin g described myinven tion, whatl claim as new, and desire to secure by Letters Patent, 1s

Gonstructingsaws in such a manner as that certain ofthe teeth shall operate as guards tol prevent the saw from feeding too much or clog'- l ging in the timber, substantially as described.,

HIRAM l?.` DIIJLINGrlElAM. [n presenceofl `THOMAS; E. BUCKLEY, O. G. LAZEAR. 

